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IMPORTANT SERVICE GUIDE ◆ MODE SWITCH (PROGRAM SWITCH) ASSEMBLY POINT 1) When installing the ass’y deck on the Main PCB, be sure to align the assembly point of mode switch. ASSEMBLY POINT VCR MAIN PCB Fig. 1 ◆ HOW TO EJECT THE CASSETTE TAPE (If the tape is stuck in the unit) 1) Turn the Gear Worm Œ...
Metal Part cal return path to the chassis. Any current measured must not exceed 0.5mA. Reverse the instrument power cord plug in the out- ohmmeter let and repeat the test. See Fig. 1-1. Fig. 1-2 Insulation Resistance Test Samsung Electronics...
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(5) antenna wiring. Always inspect in all areas tinuously and new instructions are issued whenev- for pinched, out-of-place, or frayed wiring, Do not er appropriate. change spacing between a component and the printed-circuit board. Check the AC power cord for damage. Samsung Electronics...
Components identi- fied by shading, by( ) or by ( ) in the circuit dia- gram are important for safety or for the characteris- tics of the unit. Always replace them with the exact replacement components. Samsung Electronics...
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(6) Do not remove a replacement ESD device from its protective package until immediately before your are ready to install it.(Most replacement ESD devices are packaged with leads electrically short- ed together by conductive foam, aluminum foil or comparable conductive materials). Samsung Electronics...
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◆ Be sure to put on a wrist strap grounded to the sheet. ◆ Be sure to lay a conductive sheet made of copper etc. Which is grounded to the table. Samsung Electronics...
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3) Make solder land 2 points short on Pick-up. (See Fig. 1-4) 4) Disassemble the Pick-up. Note : If the assembly and disassembly are not done in correct sequence, the Pick-up may be damaged. SOLDER LAND 2 POINTS SHORT PICK-UP ASS'Y Fig. 1-4 Samsung Electronics...
- When the adjustment is completed, be sure to turn the power off. 2-1-1(a) Location of adjustment button of remote control STANDBY/ON OPEN/CLOSE STANDBY/ON OPEN/CLOSE X-Point (Tracking Center) Adjustment ; NVRAM Option Setting ; Head Switching Adjustment ; SV-DVD340, DVD-V340 SV-DVD540A/DVD545 SV-DVD640, DVD-V540 Fig. 2-1 Samsung Electronics...
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Alignment and Adjustments 2-1-1(b) TEST location for adjustment mode setting TEST BUTTON Fig. 2-2 VCR Main PCB (Top View) Samsung Electronics...
Alignment and Adjustments 2-2 DVD Adjustment 2-2-1 Location of Test Point Pin 29 of RIC1 Fig. 2-5 Location of test Point (Main PCB - Top Side) Samsung Electronics...
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Adjustment Spec. Test Point Adjustment Location TDV-533 “Pin 29 of RIC1” Ass’y Deck - Top Side Chapter 14 Flat Waveform (DVD Main PCB - Top Side) (See Fig. 2-6) (See Fig. 2-5) Fig. 2-6 Ass’y Deck (Top Side) Samsung Electronics...
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If you cannot obtain a Flat waveform, then the unit is defective. Note : The Deck must be in a horizontal position. Use both “A” and “B” screws to adjust. Typical Waveform before Adjustment Waveform after Correct Adjustment Fig. 2-7 Envelope Waveform Samsung Electronics...
Fig. 2-8 Location of Tape Transport Adjustment PINCH ROLLER FE HEAD CYLINDER ASS'Y GUIDE ROLLER "S" GUIDE ROLLER "T" POST TENSION #8 GUIDE POST #9 GUIDE POST #3 GUIDE POST MAIN BASE ACE HEAD CAPSTAN SHAFT Fig. 2-9 Tape Travel Diagram Samsung Electronics...
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HEIGHT ADJUST X-POSITION ADJUSTING SLIT SCREW (B) SCREW (D) AZIMUTH ADJUST X-POSITION LOCKING Fig. 2-10 Location of ACE Head Adjustment Screw AUDIO HEAD VIDEO HEAD 0 ~ 0 .25 mm CONTROL HEAD Fig. 2-11 ACE Head Height Adjustment Samsung Electronics...
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Fig. 2-12 Tape Guide Check c. AUDIO AZIMUTH ADJUSTMENT 1) Load alignment tape (Mono scope) and playback the 7KHz signal. 2) Connect channel-1 scope probe to audio output. 3) Adjust screw (B) to achieve maximum audio level. (See Fig. 2-10) 2-10 Samsung Electronics...
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5) Insert the (-) driver into the X-Point adjustment hole and adjust it so that envelope waveform is maximum. Test point : W325 (Audio Output) W324 (Envelope) W323 (H’D S/W -Trigger) W322 (Control Pulse) AUDIO OUTPUT ENVELOPE HEAD SWITCHING CONTROL PULSE Fig. 2-13 Location of Test point (VCR Main PCB-Top View) Samsung Electronics 2-11...
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5) If the section B in Fig. 2-15 does not meet the specification, adjust the guide roller T up or down. a b c d c,b,d/a Fig. 2-14 Envelope Waveform Adjustment H'D SWITCHING PULSE ENVELOPE Fig. 2-15 Adjustment Points 2-12 Samsung Electronics...
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) driver to obtain a flat video RF envelope as shown in Fig. 2-16. IDEAL ENVELOPE S HEIGHT TOO HIGH S HEIGHT TOO LOW T HEIGHT TOO HIGH T HEIGHT TOO LOW GUIDE ROLLER S GUIDE ROLLER T Fig. 2-16 Guide Roller S, T Height Adjustment Samsung Electronics 2-13...
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2) If excessive tape wrinkle is observed, perform the following adjustments in Playback mode : ◆ Tape wrinkle at the guide roller S, T section : Linearity adjustment. ◆ Tape wrinkle at tape guide flange : ACE head assembly coarse adjustment. 2-14 Samsung Electronics...
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4) Transportation of accurate driving force is done by gears. (Gear Center Ass’y) Note : If the spec. does not meet the followings specifications, replace the holder clutch ass’y and then recheck. <Table 2-4> MODE TORQUE g/cm GAUGE 42 ± 11 Cassette Torquemeter 145 ± 30 Cassette Torquemeter Samsung Electronics 2-15...
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Alignment and Adjustments MEMO 2-16 Samsung Electronics...
A/V Decoder DIC4 IC601 (uPD790006GF) IC602 EEPROM (TC74VHCT125) DIC3 (24C02) Level Shifter VCR Main Micom EPROM IC701 DIC2 (PT6961) (MBM29LV800BA) LED Drive IMB Flash Memory Front A/V Jack STEREO (DT701) Samsung Electronics This Document can not be used without Samsung’s authorization...
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Block Diagram MEMO Samsung Electronics This Document can not be used without Samsung’s authorization...